[urq] In Tank Screen Removal

[Ben Swann]

Scott,

 

That is a mighty big screen and interesting how it is actually inside a chamber at the
very bottom.  I was not able to get a coat hanger to it as the bend of the outlet hooks
right then left again.

 

Now mine was fairly clean and although there was some debris, not enough to slow down
flow through this or so it appeared.  Hard to really see inside the tank.  I put a small
12V bulb on a coat hanger and got enough light to see what was going on.  You would have
to have a set of needlenose that could grip very hard to pull the sock apart - it looks
fairly durable.  I don't think it will come out unless the cutout method is used.  I'm
not going to do that at this point.

 

So I swished gas around and got it as clean as I could.   I may leave the screen in if I
can't get a pike through it.

 

For those who want to know more about how the tank is constructed - it is hard to really
see inside and the tube that feeds the pump goes way up inside.  I probed with some of
the plastic vacuum line used for diff locks and it went almost a foot.  At first I
didn't see where the line was going.  It seemed to disappear.  You could see the return
line fairly easily which is near where the tube come in.  Turns out, there is a low
section that might hold a quart of gas - it is rectangular depression at the very
bottom.  There is a plate that covers the depression.  The plate has an X shaped cutout
that allows the fuel to run down into the depression.  You can just barely make out the
tip of the screen sock that sits down in there.  The screen must be fairly large - not a
small thimble sized screen that covers the tube, but more like the size of a toilet
paper tube.  The end must be clamped somewhere down and it seems like there would be
plenty of area to pass fuel even if it gets clogged.  So that is why they have lasted
this long and conceivably won't really ever clog unless a lot of debris gets in there.

 

I may just let mine ride for awhile.  The tank is easy to get out, just messy dealing
with gas.

 

I'll keep a pre-filter on there just in case anything gets through the sock, which I
think is intended to get larger debris.

 

Ben

 

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From: QSHIPQ at aol.com [mailto:QSHIPQ at aol.com] 
Sent: Wednesday, October 17, 2007 2:17 PM
To: benswann at comcast.net; ingo.rautenberg at gmail.com
Cc: urq at audifans.com
Subject: Re: [urq] In Tank Screen Removal

 

Ben

Just went thru this...  You can poke thru the bottom with a coat hanger, and/or, grab it
brutally with something thru the access hole.  Or, you can just have the tank cut,
coated and rewelded, and either leave the screen out, or have a new one installed.  That
runs about 200USD here in chicagoland, and I know Riley did it for a little less than
that in Orlando.  

 

I will say that the prefilter is the better way to go than the intank screen.  You can
backflush the prefilter to get out the crud, I got mine all but crystal clear...  .
That prefilter is NLA from audi usa, I cked about 3 weeks ago, none in the states.  That
said, it is available aftermarket if you use a 4kq application (cheap too).  Definitely
don't forget the rubber mount for the tab to body, you want those hoses to stay high
close to the body, not the suspension....

 

HTH

 

Scott J

 

 

 

 





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